Also pack ass
, or even better, "pack animal"
In crosswords you can find to answer "pack animal, in Arizona" (with 5 letters) - burro
. Sometimes just "ass" to "Beast carrying a pack"
.https://www.infoplease.com/aesops-fables-109https://americanliterature.com/author/a ... e-wild-assThe Pack-Ass and the Wild Ass
A Wild Ass, who was wandering idly about, one day came upon a Pack-Ass lying at full length in a sunny spot and thoroughly enjoying himself. Going up to him, he said, "What a lucky beast you are! Your sleek coat shows how well you live: how I envy you!" Not long after the Wild Ass saw his acquaintance again, but this time he was carrying a heavy load, and his driver was following behind and beating him with a thick stick. "Ah, my friend," said the Wild Ass, "I don't envy you any more: for I see you pay dear for your comforts."- Advantages that are dearly bought are doubtful blessings.